User manual 09/2009 - Schneider Electric

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User manual 09/2009 - Schneider Electric

The Protection FunctionIg Pick-Up Setting ValuesThe Ig pick-up setting value is expressed in multiples of In.The default Ig pick-up setting value is the same as the minimum dial value:• 0.60 In for trip units rated 25 A• 0.30 In for trip units rated 50 A• 0.20 In for trip units rated > 50 AGround fault protection can be deactivated by setting the Ig dial to the OFF position.Ground fault protection can be reactivated even with the Ig dial in the OFF position:• By fine-tuning on the keypad• Via the communication optionThe 3 tables below specify the setting values (preset by a dial) and setting ranges (set on the keypad):• For trip units rated 25 A• For trip units rated 50 A• For trip units rated > 50 AOn the keypad, the step is 0.05 In.Rating 25 AType of Setting Value or Setting Range (xIn)Preset by a dial 0.60 0.60 0.60 0.60 0.70 0.80 0.90 1 OFFSetting rangeon the keypad0.60 0.60 0.60 0.60 0.6...0.7 0.6...0.8 0.6...0.9 0.6...1 0.6...1 + OFFRating 50 AType of Setting Value or Setting Range (xIn)Preset by a dial 0.30 0.40 0.50 0.60 0.70 0.80 0.90 1 OFFSetting rangeon the keypad0.30 0.3...0.4 0.3...0.5 0.3...0.6 0.3...0.7 0.3...0.8 0.3...0.9 0.3...1 0.3...1 + OFFRating > 50 AType of Setting Value or Setting Range (x In)Preset by a dial 0.20 0.30 0.40 0.50 0.60 0.70 0.80 1 OFFSetting rangeon the keypad0.20 0.2...0.3 0.2...0.4 0.2...0.5 0.2...0.6 0.2...0.7 0.2...0.8 0.2...1 0.2...1 + OFFThe accuracy range is +/- 10%.Time Delay Setting ValuesThe tg time delay setting value is expressed in seconds. The non-tripping and breaking times areexpressed in milliseconds.The default tg time delay setting is 0 s.Table of tg setting values expressed in second(s) and the associated non-tripping and breaking timesexpressed in milliseconds (ms):ParameterValuetg (s) 0 0.1 0.2 0.3 0.4Non-tripping time (ms) 20 80 140 230 350Maximum breaking time (ms) 80 140 200 320 500Ground Fault Protection TestThe ground fault protection test can be performed on the keypad of the Micrologic trip unit (see GroundFault Protection Test (Micrologic 6), page 22). This test can be used to check the trip unit’s electronictripping function.LV434104 09/2009 65

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